New mud dragons from Svalbard: three new species of Cristaphyes and the first Arctic species of Pycnophyes (Kinorhyncha: Allomalorhagida: Pycnophyidae)
New mud dragons from Svalbard: three new species of Cristaphyes and the first Arctic species of Pycnophyes (Kinorhyncha: Allomalorhagida: Pycnophyidae)
复制标题
来自斯瓦尔巴群岛的新泥龙：三种新的 Cristaphyes 物种和第一个北极的 Pycnophyes 物种（Kinorhyncha：Allomalorhagida：Pycnophyidae）
作者：
M. Sørensen;K. Grzelak
背景Kinorhynchs是海洋，微小的无脊椎动物栖息在海底。它们的分节的树干上有刺和突起，这激发了科学家们给它们起了一个共同的名字“泥龙”。尽管自19世纪世纪以来，人们就已经知道了动吻龙，但科学界已知的物种还不到300种，而且它仍然被认为是一个在很大程度上研究不足的动物群体，特别是在北极地区，迄今为止只知道23种。方法在斯瓦尔巴群岛周围和斯匹次卑尔根峡湾的8个监测站采集样本。小型底栖动物提取的沉积物柱与LUDOX离心法，和动喙，拿起并安装光镜和扫描电镜。结果在斯瓦尔巴特群岛记录了动吻科密吻科4新种：多代泽冠吻蜱Cristaphyesdordaidelosensissp. nov.，C. glaurung sp. nov.，C. scatha sp. nov.，新种Pycnophyesankalagonsp. nov.的刚毛沿树干沿着分布。讨论新种发现后，密吻科以14种成为北极地区最具多样性的动吻科属，其次是棘吻科，有13种。到目前为止，这些是唯一分布在北极的动吻科。
Background Kinorhynchs are marine, microscopic invertebrates inhabiting the seafloors. Their segmented trunk equipped with spines and processes has inspired scientists to give them the common name “mud dragons.” Even though kinorhynchs have been known since the 19th century, less than 300 species are known to science, and it is still considered a largely understudied animal group—in particular in the Arctic, from which only 23 species are known so far. Methods Samples were collected at eight stations around Svalbard and in the fjords of Spitsbergen. Meiofauna was extracted from the sediment cores with LUDOX centrifugation method, and kinorhynchs were picked up and mounted for light- and scanning electron microscopy. Results Four new species of the kinorhynch family Pycnophyidae are described from Svalbard: Cristaphyes dordaidelosensis sp. nov., C. glaurung sp. nov., C. scatha sp. nov., and Pycnophyes ancalagon sp. nov. The new species are generally recognized by their distribution of setae along the trunk segments. Discussion After the discovery of the new species, Pycnophyidae becomes with 14 species the most diverse kinorhynch genus in the Arctic, closely followed by Echinoderidae with 13 species. So far, these are the only kinorhynch families with an Arctic distribution.